Rock stack at Botany Bay Thanet, England

The horizon is centred, always better to go for a top or bottom third line. The outcrop is interesting in texture but it's taking up too much or too little of the frame (thirds again!). Maybe a higher viewpoint was impossible but a lower one with a shorter lens could have put it down in the bottom RH corner. Midday light is against you too - it look as if it might be more interesting later on. Finally I think you need a polariser for that sky, or an grad ND if you decided to go BW. Thanks, Rick